Centrifugal air-pump.



P.. J. PETERMLLER,

GENTEIFUGAL Am PUMP. APPLmATioN FILED P21341.' 1910.

Patented May 6, 1913.v

, 595 AVT' TURNS y' rocosas.

' seams* .rosas 'enana-susanna,

'or BERLIN, GERMANY, nascente coureur, a oonroaerrou 'or 'To GENERAL NEW You enumeration. AIR-PUMP.

l Specification of Letters Patent. animation slee February i7, 1910. serial No. 544,519.

To all whom it' may concern: v

Ble it known that Farina Josas Parea- MLLnm a subject of the Emperor of vGrerpumps in which a y wheel or annulus passages in which the 1 5 driven outwardly I:la Wh vided for the entrance many, residing at Berlin, Germany1 have invented certain new and useful Improvements in Centrifugai siii T:"unps9 of which the oliowing is a specification.

This invention reiates 'to centrifugal air stream of water is thrown from -the periphery ot' a. rapidly revolving runner into a concentric stationary directing containing a plurality of air is entrapped and into suitable conduit.. en such a pump has to work against a considerable head, it is diiiicult to start it; because the water or other assisting medium tends to escape through the vopening proof the air in front of the runner or iinpellerE and so pass olf into theV airchamber' instead of proceeding through the directing wheel or annulus. To overcome this trouble, has been customary to provide a` second pump to assist in the starting, this auxiliary pump serving to re move ,the column of of the stream from the ruimer.

The object of the present invention'is to avoid the necessity of using this second pump, and to provide a runner Whichwill automaticaliy prevent the escape of the throwing water into the air chamber.

To this end the; intention consists in a runner having a plurality of radial or curved auxiliary buckets on its upper' or side surface, located within the air chamber and I at the edge of the runner, so that in case the throwing water tries tov diverge from its proper path it will be Vcaught by ,these buckets and thrown into the directing i wheeh Incidentaliy, these buckets assist the j suction effect 'of the Achamber 2in the casing 3. concentric with the upright driving shaft 4 throwing water, so that the pump is rendered more eiicient. The

w accompanying drawing is a diametrical section of a centrifugal pump embodying my. invention, f

The throwing water is supplied through a pipe l which communicates with 'an annular This chamberlis on which is .uifnuitedv the circular runner 5, having anqannular chamber 6 communicating with the chamber 2 deiiverin water to 7 the buckets 'i' which .te arraned around' the' n y D streams of. Water.

water opposing the exit tric with the runner and at- 'a .little distance therefrom is the stationary directing .wheel or annulus 9, 'containing the passages through which the throwing waterflows. In these passages the air is compressed by the The spacev between the edge of the runner air to be pumped enters through a pipe ll. The mingled air and throwing water escape from the edge yof the directing wheel into` a chamber l2, from which they are ledaway bythe conduit 13. On` the upper mg buckets which tend to throw centrifugallyvany fluid caught by them. So it follows that if any of the throwing water tries to escape from the space 15 between the runner and the directing wheel or annulus and pass up into the air chamber 10, it is instantly thrown'back by the buckets 14 and forced to flow through said wheel or annulus. Moreover, these buckets exert an impelling force upon the air as it Hows from thechamber l0 to the space 15,. which assists in the work of the pump andrenders it more eiicient. By reason of these auxiliary buckets on the runner sufficient 'energy is imparted' to the throwing water'to start the pump even under a considerable head, so that the vuse of 'a second or starting pump is unnecessary.

f The operationA can be facilitated by placing Patented May e, 1591s.

surface of the runner is a` lplurality of radial or curved ribs 14 forming water baclrinto the chamber 2. 'Concen-A and the inner edge 'of lthls vwheel communicates with an air` cham- 'gber 10-into which the vaguardl over the auXilia-ry'buckets, so' as y to'coniine 'within them the air'or water caught between them. The gua-rd isannular,

leaving a" central opening around the shaftv through which the airv can enter from the -upper part of the rangement has the advantage that the water acquires a rapid movement before vit acts on *the or .vapor and hence'as the water rushes across the relatively large gap or space between 'the runner and the annulus 9,' it is inv a conditionto advantageously carry with it the air or vaporreceivedfrom the chamber l0. It is to be noted` that the Vanves 11i-,Care so arranged .that the air or'vapor is given a chamber 10. This arcertain definite velocity before the water is f locity dent thereto.

permitted to act on it. This facilita-tes the pumping action of the water since it avoids ing water from being forced back into the air chamber.

In accordance w1th the provisions Vof the 'patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment' thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that .the invention can be carried outy by other means.

' What I claim as new and desire to secure by Letters Patent of the United States, is-

1. In a centrifugal throwing pump, th`e combination of a casing, a runner within the casing having buckets for imparting vetothe throwing liquid, an annulus that surrounds the runner and is separated therefrom by a relatively large gap, an l.air chamber in the casing thatV is in communication with the gap,`and buckets also carried i by the runner and arranged in the passage between the chamber and the gap which receive air or vapor from said chamber sepa- 'rate from the liquid supply, impart velocity to said air or va or and deliver it to the gap before it is acted upon by the liquid issuing from the runner. i

2. In a centrifugal throwing pump, the combination of a casing to which the air or vapor and the throwing liquid are admitted by separate conduits, means, including a runnersurrounded by a gap, for imparting velocity to the liquid and also for separating the air or vapor from the liquid before ythey enter the gap, an annulus separated from the periphery of the runner by said gap and having passages.. which receive the mixture of air or vapor and liquid and in which said air or vapor is compressed by the liquid, a

chamber surrounding the annulus which receives the mixture of water and compressed air ,after it is discharged from said annulus,.

and conduit means for conveying the air and water from the casing.

In a centrifugal throwing pump, the

,combination of a casing, an air chamber in casing, a runner to which thc throwing vliquid alone is admitted on one side and by which velocity is imparted t'o the liquid, said runner being surrounded by a gap which in communication with the air chamber, buckets'carried by the opposite side ot vthe runner and arranged 1n the. passage between the chamber. and the gap which buckets receive and conduit means vand air or vapor from the casing.

imacat the air or vapori vtrom said chamber unmixed with the throwing liquid and aiter impartl invelocity thereto discharge it into the gap to e acted upon by the liquid issuing trom the runner, an annulus between which and the runner said gap is formed, said annulus receiving .the mixture of liquid and air or vapor, inlets for the liquid and air or vapor, f

for conveying the lliquid 4. In a centrifugal throwing pump, the

'combination of a casing containing an annular inlet chamber for water, and an annular outlet chamber for water and compressed air, inlet and outlet conduits tor the chambers, a runner arranged to receive water from the' inlet chamber, buckets on the runner that are Iout of the path ot the water and which receiveair from a suitable inlet and impart velocity thereto, a stationary annulus provided with passages through which water and air flow and in which the air is compressed by the water, said anuulus being separated from the runner by a relatively large gap into which the air is directed by the said bucketsund located between the runner and the 'annular outlet chamber.

5.k In a centrifugal throwing pump, the combination of a casing containing inlet and outlet chambers, conduits connected therewith, an air chamber, an inlet therefor, a runner that receives water from the inlet chamber, buckets on the opposite side ot the runner from those which act on the vwafr, Said buckets receiving air from the air chamber and deliveringit to the streams et' Water after they have *been discharged by the runner, an annulus containiiigpassages which receive water from the runner and air from the buckets and in which air is compressedrby the water, said annulus ldischarging water and compressed air into the outlet chamber.

6. In a centrifugal throwing pump, the combination of a casing containing an inlet and an outlet chamberq conduite therefor, a runner and its shaft located in the inlet chamber, the buckets on' the runner receiving water from the chamber, an annulus supported by the casing and surrounding the runner and separated therefrom by a gap, the said annulus discharging into the outlet cha1nber,.a cover for the casing' containing an air chamber, buckets on the side ot the runner opposite to those acting on the water which receive air-from the air chamber, impart velocity thereto` and deliver, it to the water as it crosses said gap,

and throwing water respectiyely, a runner ics.

arranged between the chambers, an annu.- toward the gap and prevent the flow of Suid lus surrounding the runner and provided in the opposite direction. with outwardly extending passa es, pas- In witness whereof, I have hereunto set sages connecting 4the water cham er with my hand this 29 day of Jan. 1910.

5 the inlet of the runner and the air chamber v with the gap between the runner and the J. PETERMLLER. annlus, a packing to ,prevent flow along one Y side ofthe runner from -the ga to the water Witnesses: chamber, and buckets mounte on the run- ERICH. N. CERLE,

10 ner which propel air from the chamber G. CLAUsoN. 

